Denmark has effectively eliminated infections with the two biggest cancer-causing strains of human papillomavirus (HPV) since the vaccine was introduced in 2008, data suggests.Before vaccination, the prevalence of HPV16/18 was between 15 and 17%, which has decreased in vaccinated women to less than one percent by 2021.https://www.gavi.org/vaccineswork/denmark-close-wiping-out-leading-cancer-causing-hpv-strains-after-vaccine-roll-out